FL has been used in a variety of applications, such as mobile keyboard prediction [1]}, [2]}, keyword detection [3]}, medical applications [4]} and wireless communications [5]}.
Apple has also said to use FL for the vocal classifier for “Hey Siri" [6]}, the details of which however have not been published.
To the best of our knowledge, our work is the first to explore using FL for privacy-preserving training of UA models.
